import MIDI from './MIDI'

MIDI.GM = (function(arr) {
	var clean = function(name) {
		return name.replace(/[^a-z0-9 ]/gi, '').replace(/[ ]/g, '_').toLowerCase();
	};
	var res = {
		byName: { },
		byId: { },
		byCategory: { }
	};
	for (var key in arr) {
		var list = arr[key];
		for (var n = 0, length = list.length; n < length; n++) {
			var instrument = list[n];
			if (!instrument) continue;
			var num = parseInt(instrument.substr(0, instrument.indexOf(' ')), 10);
			instrument = instrument.replace(num + ' ', '');
			res.byId[--num] =
			res.byName[clean(instrument)] =
			res.byCategory[clean(key)] = {
				id: clean(instrument),
				instrument: instrument,
				number: num,
				category: key
			};
		}
	}
	return res;
})({
	'Piano': ['1 Acoustic Grand Piano', '2 Bright Acoustic Piano', '3 Electric Grand Piano', '4 Honky-tonk Piano', '5 Electric Piano 1', '6 Electric Piano 2', '7 Harpsichord', '8 Clavinet'],
	'Chromatic Percussion': ['9 Celesta', '10 Glockenspiel', '11 Music Box', '12 Vibraphone', '13 Marimba', '14 Xylophone', '15 Tubular Bells', '16 Dulcimer'],
	'Organ': ['17 Drawbar Organ', '18 Percussive Organ', '19 Rock Organ', '20 Church Organ', '21 Reed Organ', '22 Accordion', '23 Harmonica', '24 Tango Accordion'],
	'Guitar': ['25 Acoustic Guitar (nylon)', '26 Acoustic Guitar (steel)', '27 Electric Guitar (jazz)', '28 Electric Guitar (clean)', '29 Electric Guitar (muted)', '30 Overdriven Guitar', '31 Distortion Guitar', '32 Guitar Harmonics'],
	'Bass': ['33 Acoustic Bass', '34 Electric Bass (finger)', '35 Electric Bass (pick)', '36 Fretless Bass', '37 Slap Bass 1', '38 Slap Bass 2', '39 Synth Bass 1', '40 Synth Bass 2'],
	'Strings': ['41 Violin', '42 Viola', '43 Cello', '44 Contrabass', '45 Tremolo Strings', '46 Pizzicato Strings', '47 Orchestral Harp', '48 Timpani'],
	'Ensemble': ['49 String Ensemble 1', '50 String Ensemble 2', '51 Synth Strings 1', '52 Synth Strings 2', '53 Choir Aahs', '54 Voice Oohs', '55 Synth Choir', '56 Orchestra Hit'],
	'Brass': ['57 Trumpet', '58 Trombone', '59 Tuba', '60 Muted Trumpet', '61 French Horn', '62 Brass Section', '63 Synth Brass 1', '64 Synth Brass 2'],
	'Reed': ['65 Soprano Sax', '66 Alto Sax', '67 Tenor Sax', '68 Baritone Sax', '69 Oboe', '70 English Horn', '71 Bassoon', '72 Clarinet'],
	'Pipe': ['73 Piccolo', '74 Flute', '75 Recorder', '76 Pan Flute', '77 Blown Bottle', '78 Shakuhachi', '79 Whistle', '80 Ocarina'],
	'Synth Lead': ['81 Lead 1 (square)', '82 Lead 2 (sawtooth)', '83 Lead 3 (calliope)', '84 Lead 4 (chiff)', '85 Lead 5 (charang)', '86 Lead 6 (voice)', '87 Lead 7 (fifths)', '88 Lead 8 (bass + lead)'],
	'Synth Pad': ['89 Pad 1 (new age)', '90 Pad 2 (warm)', '91 Pad 3 (polysynth)', '92 Pad 4 (choir)', '93 Pad 5 (bowed)', '94 Pad 6 (metallic)', '95 Pad 7 (halo)', '96 Pad 8 (sweep)'],
	'Synth Effects': ['97 FX 1 (rain)', '98 FX 2 (soundtrack)', '99 FX 3 (crystal)', '100 FX 4 (atmosphere)', '101 FX 5 (brightness)', '102 FX 6 (goblins)', '103 FX 7 (echoes)', '104 FX 8 (sci-fi)'],
	'Ethnic': ['105 Sitar', '106 Banjo', '107 Shamisen', '108 Koto', '109 Kalimba', '110 Bagpipe', '111 Fiddle', '112 Shanai'],
	'Percussive': ['113 Tinkle Bell', '114 Agogo', '115 Steel Drums', '116 Woodblock', '117 Taiko Drum', '118 Melodic Tom', '119 Synth Drum'],
	'Sound effects': ['120 Reverse Cymbal', '121 Guitar Fret Noise', '122 Breath Noise', '123 Seashore', '124 Bird Tweet', '125 Telephone Ring', '126 Helicopter', '127 Applause', '128 Gunshot']
});

/* get/setInstrument
--------------------------------------------------- */
MIDI.getInstrument = function(channelId) {
	var channel = MIDI.channels[channelId];
	return channel && channel.instrument;
};

MIDI.setInstrument = function(channelId, program, delay) {
	var channel = MIDI.channels[channelId];
	if (delay) {
		return setTimeout(function() {
			channel.instrument = program;
		}, delay);
	} else {
		channel.instrument = program;
	}
};

/* get/setMono
--------------------------------------------------- */
MIDI.getMono = function(channelId) {
	var channel = MIDI.channels[channelId];
	return channel && channel.mono;
};

MIDI.setMono = function(channelId, truthy, delay) {
	var channel = MIDI.channels[channelId];
	if (delay) {
		return setTimeout(function() {
			channel.mono = truthy;
		}, delay);
	} else {
		channel.mono = truthy;
	}
};

/* get/setOmni
--------------------------------------------------- */
MIDI.getOmni = function(channelId) {
	var channel = MIDI.channels[channelId];
	return channel && channel.omni;
};

MIDI.setOmni = function(channelId, truthy) {
	var channel = MIDI.channels[channelId];
	if (delay) {
		return setTimeout(function() {
			channel.omni = truthy;
		}, delay);
	} else {
		channel.omni = truthy;
	}
};

/* get/setSolo
--------------------------------------------------- */
MIDI.getSolo = function(channelId) {
	var channel = MIDI.channels[channelId];
	return channel && channel.solo;
};

MIDI.setSolo = function(channelId, truthy) {
	var channel = MIDI.channels[channelId];
	if (delay) {
		return setTimeout(function() {
			channel.solo = truthy;
		}, delay);
	} else {
		channel.solo = truthy;
	}
};

/* channels
--------------------------------------------------- */
MIDI.channels = (function() { // 0 - 15 channels
	var channels = {};
	for (var i = 0; i < 16; i++) {
		channels[i] = { // default values
			instrument: i,
			pitchBend: 0,
			mute: false,
			mono: false,
			omni: false,
			solo: false
		};
	}
	return channels;
})();

/* note conversions
--------------------------------------------------- */
MIDI.keyToNote = {}; // C8  == 108
MIDI.noteToKey = {}; // 108 ==  C8

(function() {
	var A0 = 0x15; // first note
	var C8 = 0x6C; // last note
	var number2key = ['C', 'Db', 'D', 'Eb', 'E', 'F', 'Gb', 'G', 'Ab', 'A', 'Bb', 'B'];
	for (var n = A0; n <= C8; n++) {
		var octave = (n - 12) / 12 >> 0;
		var name = number2key[n % 12] + octave;
		MIDI.keyToNote[name] = n;
		MIDI.noteToKey[n] = name;
	}
})();
